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Aspartate Aminotransferase (AST)mg/dL
Alanine Aminotransferase (ALT)mg/dL
Alkaline Phosphatase (ALP)mg/dL
337 U/L very high
0 from your result
mildly elevatedelevatedvery high
1normal under 46500
what this means

337 is very high for GGT, enough that the number itself is the problem.

this is the average reading · make it yours below

reading as

This level is usually treated as urgent. A result this far outside the range is normally checked by a doctor promptly, not at your next routine appointment.

You are 291 U/L over the normal ceiling of 46. That reads very high.

337 is very high. That is above the normal range for GGT. How much it matters depends on the markers it travels with, which is what the sections below are rewritten against.

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Your BloodMarker report · Gamma-Glutamyl Transferase (GGT)

Gamma-Glutamyl Transferase (GGT) 337 U/L: Is That High?

Yes. 337 U/L is well outside the normal range for GGT.

But a number alone is only half the story. Your Aspartate Aminotransferase (AST), Alanine Aminotransferase (ALT) and your risk factors decide how much it means. Tell it who you are.

Reviewed against ALF, NIH, Mayo Clinic, AGA guidelines · Last reviewed March 30, 2026

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YOUR NUMBERS

Normal: <48
Raised: 48-119
High: 120+

Values in U/L. Your Gamma-Glutamyl Transferase (GGT) of 337 is marked.

What they say together.

Gamma-Glutamyl Transferase (GGT) is read as part of a set. Add the ones printed next to it on your test and the figures below work themselves out, with the ranges this page uses for each.

U/LHIGH
U/LexampleNORMAL
U/LexampleNORMAL
34 ÷ 38 =0.9AST to ALT ratio, the De Ritis ratio. Under 1 is the usual fatty-liver pattern; above 2 points at alcohol.
337 and 388.9GGT against ALT. GGT rising faster than ALT is the pattern that separates alcohol and bile flow from fat in the liver.
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Every marker on your test, read against your age and sex. Free.

Is Gamma-Glutamyl Transferase (GGT) 337 U/L Low, Normal, or High?

Gamma-Glutamyl Transferase (GGT) 337 U/L might be considered a significantly elevated level when compared to typical reference ranges. While these ranges can vary between laboratories, a value of 337 U/L generally suggests a pronounced activity within the body that warrants attention.

This isn't a marginal shift; it represents a significant difference from values commonly seen as within a typical range. This value is a clear invitation to explore aspects of your well-being with a proactive mindset, focusing on understanding and potential actionable steps.

what this page cannot tell you

Hemoglobin levels combined with this marker can reveal underlying conditions that neither value shows on its own

This page has not been given your Hemoglobin, so that half of the picture is missing here. It is describing the average reader with Gamma-Glutamyl Transferase (GGT), not you.

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A Gamma-Glutamyl Transferase (GGT) level of 337 U/L represents a critically elevated finding, signaling significant liver stress or damage that demands immediate clinical evaluation. This value is exceptionally high, nearly seven times above the upper limit of the normal range, indicating an active and substantial pathological process within the hepatobiliary system.

At this magnitude, common culprits often include significant alcohol-related liver injury, drug-induced liver damage, or cholestasis, where bile flow from the liver is obstructed, potentially by gallstones or tumors. Non-alcoholic fatty liver disease (NAFLD) can also drive GGT to such levels, particularly in more advanced stages.

To accurately diagnose the underlying cause, your healthcare provider will typically order additional liver function tests, such as AST, ALT, and alkaline phosphatase, alongside a complete bilirubin panel. Imaging studies like an abdominal ultrasound are crucial to visualize the liver and bile ducts for structural issues or blockages.

Patients experiencing a GGT of 337 U/L should know that delaying investigation isn't advisable; this isn't a level that often resolves spontaneously or is merely "slightly off." It necessitates a prompt and thorough diagnostic workup to identify and address the cause, aiming to prevent further progression of liver disease.

The liver and Gamma-Glutamyl Transferase (GGT) LIVER Produces Gamma-Glutamyl Transferase (GGT) Blood supply Bile output Elevated Gamma-Glutamyl Transferase (GGT) may indicate liver cell damage or stress
for your numbersThe section below is written for 337 against a general adult target. What 337 means for you depends on the rest of your lipids and your other risk factors. Your report starts from your whole picture, not one line.

Hidden Risk of Gamma-Glutamyl Transferase (GGT) 337 U/L

A Gamma-Glutamyl Transferase (GGT) level of 337 U/L, being notably elevated, often points toward conditions that might silently impact your overall metabolic health over time. This isn't just about the liver in isolation; high GGT can be a signal connected to broader systemic imbalances.

Persistent elevation can be associated with an increased likelihood of conditions like non-alcoholic fatty liver disease, which can progress if unaddressed. It may also reflect underlying insulin resistance or other aspects of metabolic syndrome, potentially influencing long-term cardiovascular well-being.

Understanding these connections is crucial for taking informed steps toward health. The emphasis here is on the chronic, underlying processes that such a high GGT level might reflect, rather than immediate acute concerns.

what this page cannot tell you

Kidney function reflected by creatinine affects how this marker is processed and what your levels actually mean

This page has not been given your Creatinine, so that half of the picture is missing here. It is describing the average reader with Gamma-Glutamyl Transferase (GGT), not you.

Read mine against my Creatinine →

A Gamma-Glutamyl Transferase (GGT) level of 337 U/L, significantly exceeding the normal range, indicates substantial stress or damage to the liver or biliary system. This elevated marker is strongly associated with an increased risk of developing severe liver conditions, including alcoholic liver disease progression, non-alcoholic steatohepatitis (NASH) complications, and even early-stage fibrosis or cirrhosis if the underlying cause is not addressed.

The high level suggests ongoing cellular injury, potentially leading to impaired detoxification and bile flow. Left unmanaged, this could progress to more advanced liver dysfunction, impacting overall metabolic health and potentially requiring medical intervention beyond lifestyle adjustments.

for your numbersThe risk below is the average one for this GGT. Whether it applies to you depends on the rest of your panel, which the article has not been given. Add them and this stops describing strangers.
  • Potential connection to the progression of non-alcoholic fatty liver disease (NAFLD).
  • Possible indicator of underlying metabolic health challenges.
  • May reflect an increased burden on the body’s detoxification systems.

This part is about the number

Everything below explains what raises Gamma-Glutamyl Transferase (GGT). It cannot tell you which of them is yours.

Your test can. Every marker on it is read against every other one, which is where the answer actually lives.

PDF or a photo of the printout · read in seconds

What Does a Gamma-Glutamyl Transferase (GGT) Level of 337 U/L Mean?

The Gamma-Glutamyl Transferase (GGT) enzyme acts like a specialized worker found mainly in the liver, but also in other organs like the kidneys and pancreas. Think of GGT as a sensitive monitor within these organs, helping them process certain molecules and handle oxidative stress, which is a natural process where unstable molecules can cause cell damage.

When the GGT level is at 337 U/L, it’s like a very bright 'check engine' light on a complex machine, signaling a significant amount of activity or stress within these systems, particularly the liver.

This isn't a subtle flicker; it's a strong, clear indication that the liver or other related systems are working harder or experiencing some form of disruption. For instance, the liver is essential for processing substances, and a high GGT can suggest that these processes are particularly active or that there's a need for closer examination.

The body is constantly striving for balance, and such an elevated GGT value means that balance might be significantly challenged, encouraging a deeper look into why this 'alarm' is so loud.

It prompts a question about what might be causing the liver's cells to release more of this enzyme, moving beyond the normal routine.

A GGT reading of 337 U/L most commonly points towards significant alcohol consumption, often exceeding moderate guidelines, as a primary driver. Another highly plausible cause is the use of certain medications known to affect liver enzymes, such as anticonvulsants, statins, or some antibiotics, particularly with long-term use or in combination.

Fatty liver disease (hepatic steatosis), especially its inflammatory form (NASH), can also result in such marked elevations, often linked to metabolic syndrome factors like obesity and insulin resistance. Less common but possible are obstructive biliary conditions or other forms of liver injury.

Your GGT 337 means different things depending on your other markers

GGT + Hemoglobin
Hemoglobin levels combined with this marker can reveal underlying conditions that neither value shows on its own
GGT + Creatinine
Kidney function reflected by creatinine affects how this marker is processed and what your levels actually mean
GGT + Fasting Blood Glucose
Blood sugar status interacts with this marker in ways that change the clinical significance of your result
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The part one number cannot show
Your GGT of 337 means different things depending on its companion markers.
Your full panel shows which story is yours.
See what is driving yours →

Lifestyle Changes for Gamma-Glutamyl Transferase (GGT) 337 U/L

Addressing a Gamma-Glutamyl Transferase (GGT) 337 U/L level often involves exploring comprehensive lifestyle adjustments beyond just food choices. Regular physical activity plays a pivotal role in supporting metabolic health and can influence liver enzyme levels.

Engaging in a mix of aerobic exercises, like brisk walking or cycling, and strength training can help improve insulin sensitivity and reduce fat accumulation, including in the liver. Consistency is key, aiming for moderate intensity most days of the week.

Managing stress effectively is another powerful lever. Chronic stress can impact various bodily systems, including those related to inflammation and metabolic balance. Practices such as mindfulness meditation, deep breathing exercises, spending time in nature, or engaging in relaxing hobbies can contribute positively to overall well-being.

Furthermore, ensuring adequate and quality sleep is fundamental. Poor sleep can disrupt hormone regulation and metabolic function, which in turn can affect liver health. Aiming for 7-9 hours of restful sleep nightly supports the body’s natural repair and detoxification processes.

Reducing exposure to environmental toxins where possible, for example by choosing non-toxic household products, might also play a supportive role in lightening the load on your body’s processing systems. Every small, consistent effort in these areas contributes to a holistic approach to health.

If your GGT level is 337 U/L, immediate and focused action is required. You must schedule a follow-up appointment with your physician urgently to discuss potential causes and further diagnostic testing, which may include liver function panel rechecks, viral hepatitis serologies, and abdominal ultrasound.

If you consume alcohol, abstinence is the highest yield lifestyle change; cease immediately and monitor. Review all current medications with your doctor for potential hepatotoxicity. Tracking daily intake of fats and sugars may also be beneficial.

Referral to a hepatologist or gastroenterologist is strongly recommended for specialized evaluation and management plan.

for your numbersThis section lists every reason GGT moves, because on its own the number cannot say which is yours. The rest of your panel and a few risk factors would cross most of them off in a sentence.
for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Diet Changes for Gamma-Glutamyl Transferase (GGT) 337 U/L

When Gamma-Glutamyl Transferase (GGT) is at 337 U/L, focusing on dietary choices becomes a significant proactive step. The way we nourish our bodies can profoundly influence liver health and metabolic function.

A dietary pattern rich in whole, unprocessed foods is often encouraged. This typically means emphasizing fruits, vegetables, whole grains, and lean protein sources while minimizing added sugars, refined carbohydrates, and unhealthy fats.

For instance, adopting a modified Mediterranean-style eating pattern, which is naturally abundant in antioxidants and anti-inflammatory compounds, can be particularly beneficial. The focus is on supporting the liver's natural functions and reducing potential stressors.

This involves being mindful of portion sizes and choosing nutrient-dense foods that contribute to overall vitality and metabolic harmony, aiming to reduce the burden on the liver and related systems. These dietary shifts are about fostering a supportive internal environment for your organs.

  • Increase consumption of fresh fruits and a wide variety of vegetables.
  • Prioritize whole grains over refined carbohydrates.
  • Choose lean protein sources and healthy fats like those found in avocados and olive oil.
  • Limit intake of sugary drinks, processed foods, and excessive saturated or trans fats.
Foods that support liver health Broccoli Cruciferous Coffee Liver-protective Fatty fish Omega-3s Nuts Vitamin E Olive Oil Healthy fats Reduce alcohol and processed foods to support liver recovery
for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Gamma-Glutamyl Transferase (GGT) 337 U/L in Men, Women, Elderly, and Kids

The Gamma-Glutamyl Transferase (GGT) level of 337 U/L is considerably elevated across all demographic groups, though typical GGT ranges can show some natural variation. Generally, men tend to have slightly higher GGT levels than women.

This difference is often attributed to hormonal factors or varying lifestyle exposures. For children, GGT levels are typically much lower, and a result of 337 U/L would be considered very high, prompting immediate and thorough evaluation.

In the elderly population, there can be a slight increase in average GGT levels with age due to accumulated lifetime exposures, underlying health conditions, or certain medications. However, even with these slight age or gender-based variations in average ranges, a Gamma-Glutamyl Transferase (GGT) of 337 U/L stands out as a significantly high value, regardless of whether it's observed in a man, a woman, an older individual, or a younger person.

The implications of such a high value warrant careful attention and discussion with a healthcare provider, as it goes well beyond typical fluctuations expected due to demographic differences alone. The core message remains: such an elevation is a clear signal that requires understanding.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Medicine Effects on Gamma-Glutamyl Transferase (GGT) 337 U/L

Certain medications and even some supplements can influence Gamma-Glutamyl Transferase (GGT) levels, leading to an increase. When your GGT is at 337 U/L, it's particularly important to consider any substances you might be taking.

Many prescription drugs, especially those processed by the liver, can affect liver enzyme activity as a side effect. This includes some pain relievers, cholesterol-lowering medications, anti-seizure drugs, and certain antibiotics.

Even over-the-counter medications, when used frequently or in higher doses, could contribute to elevated GGT. Furthermore, various herbal remedies and dietary supplements, while often perceived as natural and harmless, can also impact liver function and GGT levels for some individuals.

It's not about stopping any necessary treatments, but understanding their potential role. Discussing all medications, supplements, and even herbal teas with a healthcare provider offers a complete picture when interpreting a GGT 337 U/L result.

  • Prescription medications for various chronic conditions.
  • Over-the-counter pain relievers or fever reducers.
  • Certain herbal supplements and dietary aids.
for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

When to Retest Gamma-Glutamyl Transferase (GGT) 337 U/L

When a Gamma-Glutamyl Transferase (GGT) level registers at 337 U/L, repeat testing is often a key part of the follow-up strategy. This isn't just to confirm the initial reading, but to observe trends and evaluate the effectiveness of any lifestyle changes or interventions that might be explored.

A healthcare provider will typically guide the timing of repeat tests, which might be anywhere from a few weeks to a few months, depending on the individual's specific circumstances and other related health factors.

The goal is to see if the GGT level is stabilizing, decreasing, or continuing to rise. Understanding the trajectory of this enzyme activity provides valuable insights into the body's response.

For instance, if proactive steps are taken to support liver health, subsequent tests can show whether these efforts are making a difference. Consistency in the lab where tests are performed can also be helpful for accurate comparison, as slight variations might exist between different testing facilities.

A GGT of 337 U/L necessitates this kind of ongoing monitoring to help piece together a complete health narrative.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

Gamma-Glutamyl Transferase (GGT) 337 U/L — Frequently Asked Questions

A Gamma-Glutamyl Transferase (GGT) level of 337 U/L is not commonly observed within typical healthy ranges; it is significantly elevated. This level suggests a need for further investigation to understand its underlying cause.

The immediate next step often involves a comprehensive discussion with a healthcare provider who can evaluate your full health history, current medications, and lifestyle factors. They may recommend additional tests to pinpoint the reason for this elevation and guide you toward appropriate management strategies. It's about gathering more information to create a clear picture.

For a Gamma-Glutamyl Transferase (GGT) level of 337 U/L, significant lifestyle adjustments can often play a crucial role in lowering GGT and improving overall health. Changes like adopting a balanced diet, increasing physical activity, managing stress effectively, and ensuring adequate sleep can positively impact liver function and metabolic health.

These changes support the body's natural ability to regulate enzyme levels. While lifestyle shifts are powerful, the degree of reduction and whether they are sufficient alone depend on the underlying cause of the elevation.

Regular monitoring with a healthcare provider is important to assess progress and determine if additional interventions are needed.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

When Gamma-Glutamyl Transferase (GGT) is at 337 U/L, insulin resistance can be a significant contributing factor or an associated condition. Insulin resistance means your body's cells don't respond as well to insulin, leading to higher blood sugar and insulin levels.

This can put a strain on the liver, potentially leading to fat accumulation (non-alcoholic fatty liver disease) and an increase in GGT. The Mayo Clinic and other health organizations highlight the strong link between insulin resistance and elevated GGT.

Understanding and addressing insulin resistance through dietary and lifestyle changes is often a key part of managing a high GGT level like this, as it tackles a potential root cause.

for your numbersThe portions below are generic because the page does not know your body. Add your height and weight above and the fibre targets resize to you at once, a small preview of what the full report does with every number.

When to See a Doctor About Gamma-Glutamyl Transferase (GGT) 337 U/L

With a Gamma-Glutamyl Transferase (GGT) level of 337 U/L, engaging in a conversation with a healthcare provider is a highly recommended and proactive step. This significantly elevated value provides a compelling reason to seek professional insights into your health.

While this information is educational, it underscores the importance of a personalized evaluation. A doctor can review your complete medical history, assess any symptoms you might be experiencing, and consider all relevant factors to understand why your GGT is at this level.

They can help interpret this result within the context of your unique health profile, recommend further diagnostic tests if necessary, and discuss a tailored plan that may include lifestyle adjustments or other interventions.

This comprehensive approach ensures that you are taking informed and responsible steps towards understanding and supporting your well-being.

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